Lesson # 18: Infinite Sum & Sigma Sum

Infinite Sum:

Add the infinite sum of 6+2+2/3+.....

S =     6     
     (1-(-1/3))
   =      6    
         (2/3)
   = 6(3/2)
   =9

What is the formula:  S=   a   
                                       l-r

Sigma:

5

∑ 3i+2
i=1

5 - the terms
i =1  - input #
3i+2 - formula